Buyers Products B5500 Molded Rubber Bumper Set, 3 x 3-1/2 x 6 Inch Tall, Durable Rectangular Rubber Bumpers for Truck and Trailer Protection, Compression-Molded Impact Guard, Pack of 2

I mounted a pair of these on the back of out ramp at the top Buyers Products Molded Rubber... https://www.amazon.com/dp/B01N1MIU82?ref=ppx_pop_mob_ap_share Then I constructed some ramps from 3/4” ply and 2X boards, about 4’ long. They mount to the inside of the ramp on piano hinges. Open door, flip over ramps, car with splitter rolls on up.